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Arabinogalactan proteins improve plant regeneration in barley (Hordeum vulgare L.) anther culture
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Arabinogalactan proteins improve plant regeneration in barley (Hordeum vulgare L.) anther culture
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Journal Article
Arabinogalactan proteins improve plant regeneration in barley (Hordeum vulgare L.) anther culture
2017
Overview
Androgenesis-based methods of doubled haploid (DH) production show considerable variation in efficiency in different barley genotypes. Arabinogalactan proteins (AGPs) have been shown to play a key role in several developmental processes, including embryogenesis, in different plant species. In this study we investigated the effect of exogenous AGPs from gum arabic on androgenesis and the regeneration efficiency in barley anther culture. Supplementation of the induction medium with 10 mg l−1 gum arabic increased the total plant regeneration rate up to 2.8 times; when exposure to GA was extended to also include the pretreatment step, the regeneration rate was up to 6.6-times higher than in control. The effect of gum arabic was reversed by the Yariv reagent, an AGPs antagonist. This suggests a direct involvement of AGPs in androgenic development from barely microspores. Addition of gum arabic reduced cell mortality, increased the frequency of mitotic divisions of microspores and the number of multicellular structures (MCSs) when compared to control. The positive effect of gum arabic also included reduction in time required for the androgenic induction and substantially improved the quality of formed embryos. Observations made in this study imply a complex role of AGPs during androgenic development and confirmed the usefulness of gum arabic in production of barley androgenic plants.
Publisher
Springer Nature B.V
Subject
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